US 11,982,208 B2
Two-piece impeller made of multiple materials
Viktor Kilchyk, Lancaster, NY (US); and Brent J. Merritt, Southwick, MA (US)
Assigned to Hamilton Sundstrand Corporation, Charlotte, NC (US)
Filed by Hamilton Sundstrand Corporation, Charlotte, NC (US)
Filed on Oct. 7, 2022, as Appl. No. 17/962,164.
Prior Publication US 2024/0117745 A1, Apr. 11, 2024
Int. Cl. F04D 29/28 (2006.01); F01D 5/28 (2006.01); F04D 17/10 (2006.01); F04D 29/02 (2006.01)
CPC F01D 5/282 (2013.01) [F04D 17/10 (2013.01); F04D 29/023 (2013.01); F04D 29/285 (2013.01); F05D 2220/30 (2013.01); F05D 2300/603 (2013.01)] 17 Claims
OG exemplary drawing
 
1. An impeller comprising:
a metallic inducer portion comprising:
an inducer hub having an open end;
an inducer bore through the inducer hub;
inducer blades attached to the inducer hub;
an inducer coupling on an end of the inducer hub opposite the open end of the inducer hub; and
channels extending through the inducer blades and the inducer hub, wherein the channels fluidly connect channel inlets in tips of the inducer blades with the inducer bore; and
a polymeric exducer portion connected to the metallic inducer portion, the polymeric exducer portion comprising:
an exducer hub;
exducer blades attached to the exducer hub; and
an exducer coupling on an end of the exducer hub;
wherein the exducer coupling connects to the inducer coupling; and
wherein a polymer for the polymeric exducer portion is chosen from the group consisting of para-aramid fiber, aramid fiber, and combinations thereof.